<?php

// LC_MESSAGES is not available if php-gettext is not loaded
// while the other constants are already available from session extension.
if (! defined('LC_MESSAGES')) {
    define('LC_MESSAGES', 5);
}

require ('streams.php');
require ('gettext.php');

// Variables

global $text_domains, $default_domain, $LC_CATEGORIES, $EMULATEGETTEXT, $CURRENTLOCALE;
$text_domains = array();
$default_domain = 'messages';
$LC_CATEGORIES = array(
    'LC_CTYPE',
    'LC_NUMERIC',
    'LC_TIME',
    'LC_COLLATE',
    'LC_MONETARY',
    'LC_MESSAGES',
    'LC_ALL'
);
$EMULATEGETTEXT = 0;
$CURRENTLOCALE = '';

class domain {

    var $l10n;

    var $path;

    var $codeset;
}

// Utility functions
function get_list_of_locales($locale) {
    $locale_names = array();
    $lang = NULL;
    $country = NULL;
    $charset = NULL;
    $modifier = NULL;
    if ($locale) {
        if (preg_match("/^(?P<lang>[a-z]{2,3})" . // language code
"(?:_(?P<country>[A-Z]{2}))?" . // country code
"(?:\.(?P<charset>[-A-Za-z0-9_]+))?" . // charset
"(?:@(?P<modifier>[-A-Za-z0-9_]+))?$/", // @ modifier
$locale, $matches)) {
            
            if (isset($matches["lang"]))
                $lang = $matches["lang"];
            if (isset($matches["country"]))
                $country = $matches["country"];
            if (isset($matches["charset"]))
                $charset = $matches["charset"];
            if (isset($matches["modifier"]))
                $modifier = $matches["modifier"];
            
            if ($modifier) {
                if ($country) {
                    if ($charset)
                        array_push($locale_names, "${lang}_$country.$charset@$modifier");
                    array_push($locale_names, "${lang}_$country@$modifier");
                } elseif ($charset)
                    array_push($locale_names, "${lang}.$charset@$modifier");
                array_push($locale_names, "$lang@$modifier");
            }
            if ($country) {
                if ($charset)
                    array_push($locale_names, "${lang}_$country.$charset");
                array_push($locale_names, "${lang}_$country");
            } elseif ($charset)
                array_push($locale_names, "${lang}.$charset");
            array_push($locale_names, $lang);
        }
        
        // If the locale name doesn't match POSIX style, just include it as-is.
        if (! in_array($locale, $locale_names))
            array_push($locale_names, $locale);
    }
    return $locale_names;
}

function _get_reader($domain = null, $category = 5, $enable_cache = true) {
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (! isset($domain))
        $domain = $default_domain;
    if (! isset($text_domains[$domain]->l10n)) {
        // get the current locale
        $locale = _setlocale(LC_MESSAGES, 0);
        $bound_path = isset($text_domains[$domain]->path) ? $text_domains[$domain]->path : './';
        $subpath = $LC_CATEGORIES[$category] . "/$domain.mo";
        
        $locale_names = get_list_of_locales($locale);
        $input = null;
        foreach ($locale_names as $locale) {
            $full_path = $bound_path . $locale . "/" . $subpath;
            if (file_exists($full_path)) {
                $input = new FileReader($full_path);
                break;
            }
        }
        
        if (! array_key_exists($domain, $text_domains)) {
            // Initialize an empty domain object.
            $text_domains[$domain] = new domain();
        }
        $text_domains[$domain]->l10n = new gettext_reader($input, $enable_cache);
    }
    return $text_domains[$domain]->l10n;
}

function locale_emulation() {
    global $EMULATEGETTEXT;
    return $EMULATEGETTEXT;
}

function _check_locale_and_function($function = false) {
    global $EMULATEGETTEXT;
    if ($function and ! function_exists($function))
        return false;
    return ! $EMULATEGETTEXT;
}

function _get_codeset($domain = null) {
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (! isset($domain))
        $domain = $default_domain;
    return (isset($text_domains[$domain]->codeset)) ? $text_domains[$domain]->codeset : ini_get('mbstring.internal_encoding');
}

function _encode($text) {
    if (function_exists('mb_covert_encoding')) {
        $source_encoding = mb_detect_encoding($text);
        $target_encoding = _get_codeset();
        if ($source_encoding != $target_encoding) {
            return mb_convert_encoding($text, $target_encoding, $source_encoding);
        } else {
            return $text;
        }
    }
    
    return $text;
}

// Custom implementation of the standard gettext related functions
function _get_default_locale($locale) {
    if ($locale == '') // emulate variable support
        return getenv('LANG');
    else
        return $locale;
}

function _setlocale($category, $locale) {
    global $CURRENTLOCALE, $EMULATEGETTEXT;
    if ($locale === 0) { // use === to differentiate between string "0"
        if ($CURRENTLOCALE != '')
            return $CURRENTLOCALE;
        else
            // obey LANG variable, maybe extend to support all of LC_* vars
            // even if we tried to read locale without setting it first
            return _setlocale($category, $CURRENTLOCALE);
    } else {
        if (function_exists('setlocale')) {
            $ret = setlocale($category, $locale);
            if (($locale == '' and ! $ret) or // failed setting it by env
($locale != '' and $ret != $locale)) { // failed setting it
                                                   // Failed setting it according to environment.
                $CURRENTLOCALE = _get_default_locale($locale);
                $EMULATEGETTEXT = 1;
            } else {
                $CURRENTLOCALE = $ret;
                $EMULATEGETTEXT = 0;
            }
        } else {
            // No function setlocale(), emulate it all.
            $CURRENTLOCALE = _get_default_locale($locale);
            $EMULATEGETTEXT = 1;
        }
        // Allow locale to be changed on the go for one translation domain.
        global $text_domains, $default_domain;
        if (array_key_exists($default_domain, $text_domains)) {
            unset($text_domains[$default_domain]->l10n);
        }
        return $CURRENTLOCALE;
    }
}

function _bindtextdomain($domain, $path) {
    global $text_domains;
    // ensure $path ends with a slash ('/' should work for both, but lets still play nice)
    if (substr(php_uname(), 0, 7) == "Windows") {
        if ($path[strlen($path) - 1] != '\\' and $path[strlen($path) - 1] != '/')
            $path .= '\\';
    } else {
        if ($path[strlen($path) - 1] != '/')
            $path .= '/';
    }
    if (! array_key_exists($domain, $text_domains)) {
        // Initialize an empty domain object.
        $text_domains[$domain] = new domain();
    }
    $text_domains[$domain]->path = $path;
}

function _bind_textdomain_codeset($domain, $codeset) {
    global $text_domains;
    $text_domains[$domain]->codeset = $codeset;
}

function _textdomain($domain) {
    global $default_domain;
    $default_domain = $domain;
}

function _gettext($msgid) {
    $l10n = _get_reader();
    return _encode($l10n->translate($msgid));
}

function __($msgid) {
    return _gettext($msgid);
}

function _ngettext($singular, $plural, $number) {
    $l10n = _get_reader();
    return _encode($l10n->ngettext($singular, $plural, $number));
}

function _dgettext($domain, $msgid) {
    $l10n = _get_reader($domain);
    return _encode($l10n->translate($msgid));
}

function _dngettext($domain, $singular, $plural, $number) {
    $l10n = _get_reader($domain);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

function _dcgettext($domain, $msgid, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->translate($msgid));
}

function _dcngettext($domain, $singular, $plural, $number, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

function _pgettext($context, $msgid) {
    $l10n = _get_reader();
    return _encode($l10n->pgettext($context, $msgid));
}

function _dpgettext($domain, $context, $msgid) {
    $l10n = _get_reader($domain);
    return _encode($l10n->pgettext($context, $msgid));
}

function _dcpgettext($domain, $context, $msgid, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->pgettext($context, $msgid));
}

function _npgettext($context, $singular, $plural) {
    $l10n = _get_reader();
    return _encode($l10n->npgettext($context, $singular, $plural));
}

function _dnpgettext($domain, $context, $singular, $plural) {
    $l10n = _get_reader($domain);
    return _encode($l10n->npgettext($context, $singular, $plural));
}

function _dcnpgettext($domain, $context, $singular, $plural, $category) {
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->npgettext($context, $singular, $plural));
}

// Wrappers to use if the standard gettext functions are available,
// but the current locale is not supported by the system.
// Use the standard impl if the current locale is supported, use the
// custom impl otherwise.
function T_setlocale($category, $locale) {
    return _setlocale($category, $locale);
}

function T_bindtextdomain($domain, $path) {
    if (_check_locale_and_function())
        return bindtextdomain($domain, $path);
    else
        return _bindtextdomain($domain, $path);
}

function T_bind_textdomain_codeset($domain, $codeset) {
    // bind_textdomain_codeset is available only in PHP 4.2.0+
    if (_check_locale_and_function('bind_textdomain_codeset'))
        return bind_textdomain_codeset($domain, $codeset);
    else
        return _bind_textdomain_codeset($domain, $codeset);
}

function T_textdomain($domain) {
    if (_check_locale_and_function())
        return textdomain($domain);
    else
        return _textdomain($domain);
}

function T_gettext($msgid) {
    if (_check_locale_and_function())
        return gettext($msgid);
    else
        return _gettext($msgid);
}

function T_($msgid) {
    if (_check_locale_and_function())
        return _($msgid);
    return __($msgid);
}

function T_ngettext($singular, $plural, $number) {
    if (_check_locale_and_function())
        return ngettext($singular, $plural, $number);
    else
        return _ngettext($singular, $plural, $number);
}

function T_dgettext($domain, $msgid) {
    if (_check_locale_and_function())
        return dgettext($domain, $msgid);
    else
        return _dgettext($domain, $msgid);
}

function T_dngettext($domain, $singular, $plural, $number) {
    if (_check_locale_and_function())
        return dngettext($domain, $singular, $plural, $number);
    else
        return _dngettext($domain, $singular, $plural, $number);
}

function T_dcgettext($domain, $msgid, $category) {
    if (_check_locale_and_function())
        return dcgettext($domain, $msgid, $category);
    else
        return _dcgettext($domain, $msgid, $category);
}

function T_dcngettext($domain, $singular, $plural, $number, $category) {
    if (_check_locale_and_function())
        return dcngettext($domain, $singular, $plural, $number, $category);
    else
        return _dcngettext($domain, $singular, $plural, $number, $category);
}

function T_pgettext($context, $msgid) {
    if (_check_locale_and_function('pgettext'))
        return pgettext($context, $msgid);
    else
        return _pgettext($context, $msgid);
}

function T_dpgettext($domain, $context, $msgid) {
    if (_check_locale_and_function('dpgettext'))
        return dpgettext($domain, $context, $msgid);
    else
        return _dpgettext($domain, $context, $msgid);
}

function T_dcpgettext($domain, $context, $msgid, $category) {
    if (_check_locale_and_function('dcpgettext'))
        return dcpgettext($domain, $context, $msgid, $category);
    else
        return _dcpgettext($domain, $context, $msgid, $category);
}

function T_npgettext($context, $singular, $plural, $number) {
    if (_check_locale_and_function('npgettext'))
        return npgettext($context, $singular, $plural, $number);
    else
        return _npgettext($context, $singular, $plural, $number);
}

function T_dnpgettext($domain, $context, $singular, $plural, $number) {
    if (_check_locale_and_function('dnpgettext'))
        return dnpgettext($domain, $context, $singular, $plural, $number);
    else
        return _dnpgettext($domain, $context, $singular, $plural, $number);
}

function T_dcnpgettext($domain, $context, $singular, $plural, $number, $category) {
    if (_check_locale_and_function('dcnpgettext'))
        return dcnpgettext($domain, $context, $singular, $plural, $number, $category);
    else
        return _dcnpgettext($domain, $context, $singular, $plural, $number, $category);
}

// Wrappers used as a drop in replacement for the standard gettext functions

if (! function_exists('gettext')) {

    function bindtextdomain($domain, $path) {
        return _bindtextdomain($domain, $path);
    }

    function bind_textdomain_codeset($domain, $codeset) {
        return _bind_textdomain_codeset($domain, $codeset);
    }

    function textdomain($domain) {
        return _textdomain($domain);
    }

    function gettext($msgid) {
        return _gettext($msgid);
    }

    function _($msgid) {
        return __($msgid);
    }

    function ngettext($singular, $plural, $number) {
        return _ngettext($singular, $plural, $number);
    }

    function dgettext($domain, $msgid) {
        return _dgettext($domain, $msgid);
    }

    function dngettext($domain, $singular, $plural, $number) {
        return _dngettext($domain, $singular, $plural, $number);
    }

    function dcgettext($domain, $msgid, $category) {
        return _dcgettext($domain, $msgid, $category);
    }

    function dcngettext($domain, $singular, $plural, $number, $category) {
        return _dcngettext($domain, $singular, $plural, $number, $category);
    }

    function pgettext($context, $msgid) {
        return _pgettext($context, $msgid);
    }

    function npgettext($context, $singular, $plural, $number) {
        return _npgettext($context, $singular, $plural, $number);
    }

    function dpgettext($domain, $context, $msgid) {
        return _dpgettext($domain, $context, $msgid);
    }

    function dnpgettext($domain, $context, $singular, $plural, $number) {
        return _dnpgettext($domain, $context, $singular, $plural, $number);
    }

    function dcpgettext($domain, $context, $msgid, $category) {
        return _dcpgettext($domain, $context, $msgid, $category);
    }

    function dcnpgettext($domain, $context, $singular, $plural, $number, $category) {
        return _dcnpgettext($domain, $context, $singular, $plural, $number, $category);
    }
}

?>
